Water tank meter, capacitive sensor
No the article I'm referring to is available at the Nuts and Volts
magazine website and the app note refers to just one method. That
being a capacitive sensor place on an external tube. As the water
enters the tube the dielectric coeffcient is changed and the frequency
of the oscillator shifts accordingly.
ftp://nutsvolts.com/stampaps/st_ap27.pdf
Try it. It works well, and best of all the electrics never get wet.
Ron
Original Message
From: <samhell@s...>
To: <basicstamps@egroups.com>
Cc: <ebowam@h...>
Sent: Friday, October 13, 2000 10:38 PM
Subject: Re: [noparse][[/noparse]basicstamps] Water tank meter
> The article Ron Anderson refers to has about 10-12 ways to measure
water
> levels in containers, some with mechanical means, others with
resistance,
> conductivity, and some other means. I dont have the link to the
article
> either, but I think I saved the pdf. somewhere..I will
look for
> it and sent it if I find it. I seem to recall
stumbling over
> it pretty easy though.
>
> Dave
>
Original Message
> From: Brian McClure <bmcclure@p...>
> To: basicstamps@egroups.com <basicstamps@egroups.com>
> Cc: ebowam@h... <ebowam@h...>
> Date: Friday, October 13, 2000 6:14 PM
> Subject: Re: [noparse][[/noparse]basicstamps] Water tank meter
>
>
> >If you are looking for a pressure sensor check Motorola
www.mot.com they
> >have true, differential and other types of pressure sensors. Most
have a
> >0-5v output which you could read using an ADC. You can call or
email them
> >and many times get engineering samples for free.
> >
> >
> >
> >Brian
> >
> >
> >
Original Message
> >From: "Mindz Development House" <mindz@a...>
> >To: <basicstamps@egroups.com>
> >Cc: <ebowam@h...>
> >Sent: Friday, October 13, 2000 10:33 AM
> >Subject: [noparse][[/noparse]basicstamps] Water tank meter
> >
> >
> >> I have two 500 gallon water tanks as the main water supply source
for a
> >> house. I'm trying to build a level meter using a Stamp. My
major hurdle
> >is
> >> how to determine the water level in the tank electronically
(without
> >> mechanical floats). Does anyone out there have any practical
ideas?
> >> Thanks
> >>
> >> Ebow
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
>
>
>
>
>
>
magazine website and the app note refers to just one method. That
being a capacitive sensor place on an external tube. As the water
enters the tube the dielectric coeffcient is changed and the frequency
of the oscillator shifts accordingly.
ftp://nutsvolts.com/stampaps/st_ap27.pdf
Try it. It works well, and best of all the electrics never get wet.
Ron
Original Message
From: <samhell@s...>
To: <basicstamps@egroups.com>
Cc: <ebowam@h...>
Sent: Friday, October 13, 2000 10:38 PM
Subject: Re: [noparse][[/noparse]basicstamps] Water tank meter
> The article Ron Anderson refers to has about 10-12 ways to measure
water
> levels in containers, some with mechanical means, others with
resistance,
> conductivity, and some other means. I dont have the link to the
article
> either, but I think I saved the pdf. somewhere..I will
look for
> it and sent it if I find it. I seem to recall
stumbling over
> it pretty easy though.
>
> Dave
>
Original Message
> From: Brian McClure <bmcclure@p...>
> To: basicstamps@egroups.com <basicstamps@egroups.com>
> Cc: ebowam@h... <ebowam@h...>
> Date: Friday, October 13, 2000 6:14 PM
> Subject: Re: [noparse][[/noparse]basicstamps] Water tank meter
>
>
> >If you are looking for a pressure sensor check Motorola
www.mot.com they
> >have true, differential and other types of pressure sensors. Most
have a
> >0-5v output which you could read using an ADC. You can call or
email them
> >and many times get engineering samples for free.
> >
> >
> >
> >Brian
> >
> >
> >
Original Message
> >From: "Mindz Development House" <mindz@a...>
> >To: <basicstamps@egroups.com>
> >Cc: <ebowam@h...>
> >Sent: Friday, October 13, 2000 10:33 AM
> >Subject: [noparse][[/noparse]basicstamps] Water tank meter
> >
> >
> >> I have two 500 gallon water tanks as the main water supply source
for a
> >> house. I'm trying to build a level meter using a Stamp. My
major hurdle
> >is
> >> how to determine the water level in the tank electronically
(without
> >> mechanical floats). Does anyone out there have any practical
ideas?
> >> Thanks
> >>
> >> Ebow
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
>
>
>
>
>
>